Bake to image used for rendering glitch (bake feedback loop) #27120

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JÄdrzej Slewczuk · 2011-04-22T14:25:06+02:00

2011-04-22 14:25:06 +02:00

%%%I have noticed these three troubles and these appear randomly... Artifact it's lack of alpha support in bake and also irregular fill of 'black'. I have tested in trunk r36281 on Windows 7 (polish language). All details are in .mov and .blend files (after unpack .zip).%%%

JÄdrzej Slewczuk commented

2011-04-22 14:25:06 +02:00

Changed status to: 'Open'

JÄdrzej Slewczuk commented

2011-04-22 15:06:55 +02:00

%%%I use this method for generating UV Margin after I finished painting texture.%%%

JÄdrzej Slewczuk commented

2011-04-22 17:33:20 +02:00

%%%Ups... My mistake... It support alpha. I have forgotten to enabled it correct in material settings... But artifacts still appear sometimes...%%%

Campbell Barton commented

2011-04-22 18:11:59 +02:00

%%%assigning to myself.%%%

Campbell Barton commented

2011-04-22 18:18:57 +02:00

%%%The problem is you're baking onto the same image you're using to render with so you get a feedback loop during the bake.

The fix here would be to duplicate the image buffer for baking or not allow this to happen at all and give an error.

Leave this open for now.%%%

%%%The problem is you're baking onto the same image you're using to render with so you get a feedback loop during the bake. The fix here would be to duplicate the image buffer for baking or not allow this to happen at all and give an error. Leave this open for now.%%%

JÄdrzej Slewczuk commented

2011-04-22 18:31:30 +02:00

%%%I prefer 'duplicate the image buffer for baking', because IMHO it's bad design (It's frustrating, and not artist friendly...): creating new UV Texture slot and new bitmap file JUST FOR simply adding UV Margins on texture which has finished editing, which it just need last touch - adding UV Margins...%%%

ronan ducluzeau commented

2011-09-12 17:25:43 +02:00

%%%ubuntu 11.04 64bits Rev 40164

Alpha seems correctly supported,here.
You have to enable Use Alpha option in Image Sampling Panel in Texture Properties.

But another artifact came from your modeling. Overlapping faces for the ear is not a good choice.
You can use Two-sided Option in Texture Face Panel in Mesh Properties.
And you must detach ear from rest of the head to avoid white artefact.%%%

%%%ubuntu 11.04 64bits Rev 40164 Alpha seems correctly supported,here. You have to enable Use Alpha option in Image Sampling Panel in Texture Properties. But another artifact came from your modeling. Overlapping faces for the ear is not a good choice. You can use Two-sided Option in Texture Face Panel in Mesh Properties. And you must detach ear from rest of the head to avoid white artefact.%%%

Sergey Sharybin commented

2012-01-19 12:14:11 +01:00

%%%It's a bit complicated to detect if image should be duplicated or not and the only working way would be to detect feedback loops during baking and duplicated images if loop was found and then somehow images should be merged back. Detecting loop is simple enough but that image duplication is a really tricky thing and make code tangled and difficult to support. Discussed this with Brecht and he've got the same thinking.
Attaching patch which prevents baking to image used for rendering, want Brecht to glance at it before commiting.
Think if you're using such configuration for adding margin only it'll be more useful to have margin filter in image editor.%%%

%%%It's a bit complicated to detect if image should be duplicated or not and the only working way would be to detect feedback loops during baking and duplicated images if loop was found and then somehow images should be merged back. Detecting loop is simple enough but that image duplication is a really tricky thing and make code tangled and difficult to support. Discussed this with Brecht and he've got the same thinking. Attaching patch which prevents baking to image used for rendering, want Brecht to glance at it before commiting. Think if you're using such configuration for adding margin only it'll be more useful to have margin filter in image editor.%%%

Sergey Sharybin commented

2012-01-20 08:46:09 +01:00

%%%Commited to revision r43554. It might be improved, but for now it's the only way which fits design.
Thanks for the report, closing it now.%%%

%%%Commited to revision r43554. It might be improved, but for now it's the only way which fits design. Thanks for the report, closing it now.%%%

Sergey Sharybin commented

2012-01-20 08:46:11 +01:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2012-01-20 08:46:11 +01:00

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Bake to image used for rendering glitch (bake feedback loop) #27120